-LRB- CNN -RRB- -- Evidence in the case of a Michigan boy who vanished for nearly two weeks before turning up in his father 's basement will not be turned over to prosecutors until at least next week , authorities said Wednesday .

The information being presented to Detroit prosecutors includes allegations that the 12-year-old boy , Charlie Bothuell , made to county child welfare authorities . Sgt. Michael Woody had earlier said the evidence could be handed over as early as Wednesday .

The agency opened an investigation of the family June 23 after FBI agents looking into the boy 's disappearance interviewed his grandmother .

That same day , the boy 's father allegedly told investigators that he used a PVC pipe to discipline him , leaving a scar on the boy 's chest , according to a petition filed with the Wayne County Department of Health & Human Services . There was blood on the pipe , and old scars on the boy 's buttocks , the petition said . The timing of the injuries is unclear , police said .

`` We are close to getting ready to submit our package to prosecutors , '' police Sgt. Michael Woody told CNN , adding the evidence could be turned over Wednesday .

The Wayne County Prosecutor 's Office will decide whether criminal charges will be filed .

Mark Magidson , an attorney for the boy 's father and stepmother , did not immediately return calls Wednesday seeking comment .

Charlie Bothuell IV told authorities his son ran away after being scolded for not exercising or doing his chores .

The FBI interviewed the boy as part of the investigation .

The petition quoted the boy 's grandmother as saying that he appeared thin and sickly when she last saw him . `` He had marks all over his arms and chest , '' the grandmother is quoted as saying .

The FBI declined comment beyond acknowledging that agents met with the child .

Charles Bothuell IV , and stepmother , Monique , have two other children . Both were taken into protective custody , investigators said . The child 's father is not allowed to have any contact with Charlie while the investigation continues .

The boy was discovered June 25 in the basement of his father 's home , behind a barricade after numerous searches of the home in the days following his disappearance on June 14 .

Police said the boy had snacks and a sports drink in the basement . He told police his stepmother allegedly told him to hide there and `` not to come out , no matter what he hears , '' according to court petition .

Charlie Bothuell IV learned his son was found during a taped interview last week with HLN 's Nancy Grace , when he said he no idea the boy was in the basement . The boy 's stepmother , charged with an unrelated probation violation involving a gun , pleaded not guilty in that case .

A lie detector test taken by the father was inconclusive , police said . The boy 's stepmother declined to take a polygraph . The tests are not permitted to be used as evidence at trial .

Charlie is staying with relatives , police said .

Michigan investigators talk with boy about basement ordeal

In Georgia : Parents lock son in basement for ` disciplinary reasons '

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Police turning over evidence to prosecutors next week in case of missing Michigan boy

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Information includes allegations the 12-year-old boy made to child welfare authorities

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Charlie Bothuell was found in basement of his father 's home

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Document says father allegedly used a PVC pipe to discipline boy ; no charges have been filed